(;GM[1]FF[4]SZ[19]
GN[Var 7]
PC[http://senseis.xmp.net/?DieterVerhofstadt/SolvingProblems]AP[GoWiki:2009]
DT[2014-03-28]
C[Diagram from http://senseis.xmp.net/?DieterVerhofstadt/SolvingProblems

Var 7]
PL[B]

AB[gn][hn][fo][ho][ep][fp][gp][hp][ip][eq][iq][cr][er][gr][gs]
AW[gm][hm][en][fn][in][do][jo][dp][jp][bq][dq][gq][hq][jq][kq][br][hr][ir][es]

;B[jr]C[B1]MN[1]
;W[fr]C[W2]MN[2]
;B[fq]C[B3]MN[3]
;W[kr]C[W4]MN[4]

;
)
